30242155 has 4 divisors (see below), whose sum is σ = 36290592. Its totient is φ = 24193720.

The previous prime is 30242131. The next prime is 30242189. The reversal of 30242155 is 55124203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55124203 = 139 ⋅396577.

It is not a de Polignac number, because 30242155 - 2⁵ = 30242123 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3024211 + ... + 3024220.

It is an arithmetic number, because the mean of its divisors is an integer number (9072648).

Almost surely, 2^30242155 is an apocalyptic number.

30242155 is a deficient number, since it is larger than the sum of its proper divisors (6048437).

30242155 is an equidigital number, since it uses as much as digits as its factorization.

30242155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6048436.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 30242155 is about 5499.2867719369. The cubic root of 30242155 is about 311.5570466130.

Adding to 30242155 its reverse (55124203), we get a palindrome (85366358).

The spelling of 30242155 in words is "thirty million, two hundred forty-two thousand, one hundred fifty-five".